public class EX4_9 {
	public static void main(String args[]) {
		SIM simOne = new SIM(13889776509L);
		MobileTelephone mobile = new MobileTelephone();
		mobile.setSIM(simOne);
		System.out.println("手机号码："+mobile.lookNumber());
		SIM simTwo = new SIM(1596756367L);
		mobile.setSIM(simTwo);
		 System.out.println("手机号码："+mobile.lookNumber());

	}
}
